Sir Paul McCartney has been world famous for over 60 years, regularly performing concerts to thousands.

And yet, even after all this time, The Beatles legend still feels another living musician makes him nervous, and it’s one he’d love to collaborate with.

Previously answering fan questions on his official website, one asked Macca: “Is there anyone else you would like to sing a duet with?”

The star replied: “Bob Dylan keeps coming up in my mind, but I don’t know if we’ll ever get…